Implemented shelter relations and repository

src/main/java/cat/udl/eps/softarch/demo/domain/Shelter.java

@@ -1,16 +1,14 @@
 package cat.udl.eps.softarch.demo.domain;
 
-import jakarta.persistence.Column;
-import jakarta.persistence.Entity;
-import jakarta.validation.constraints.NotNull;
-import jakarta.validation.constraints.Pattern;
-import lombok.Data;
-import jakarta.persistence.Id;
+import com.fasterxml.jackson.annotation.JsonIdentityReference;
+import jakarta.persistence.*;
 import jakarta.validation.constraints.Email;
 import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import jakarta.validation.constraints.Pattern;
 import jdk.jfr.BooleanFlag;
+import lombok.Data;
 import lombok.EqualsAndHashCode;
-import org.hibernate.validator.constraints.Length;
 
 import java.time.LocalDateTime;
 
@@ -19,6 +17,21 @@
 @EqualsAndHashCode(callSuper = false)
 public class Shelter extends UriEntity<Long> {
 
+    @ManyToOne
+    @NotNull
+    @JsonIdentityReference(alwaysAsId = true)
+    private User user;
+
+    @ManyToOne
+    @NotNull
+    @JsonIdentityReference(alwaysAsId = true)
+    private Pet pet;
+
+    @OneToOne
+    @NotNull
+    @JsonIdentityReference(alwaysAsId = true)
+    private ShelterCertificate shelterCertificate;
+
     @Id
     private Long id;
 

src/main/java/cat/udl/eps/softarch/demo/repository/ShelterRepository.java

@@ -0,0 +1,9 @@
+package cat.udl.eps.softarch.demo.repository;
+
+import cat.udl.eps.softarch.demo.domain.Shelter;
+import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.repository.PagingAndSortingRepository;
+
+public interface ShelterRepository extends CrudRepository<Shelter, String>, PagingAndSortingRepository<Shelter, String> {
+    Shelter findName(String name);
+}